Ok cool!!!
I try this and is work now.
ok, I declared my variables at wrong place.
code:
function OnEvent_Initialize(MessengerStart){
var _x = Interop.Call('user32', 'GetSystemMetrics', 0x4e /* SM_CXVIRTUALSCREEN */);
var _y = Interop.Call('user32', 'GetSystemMetrics', 0x4f /* SM_CYVIRTUALSCREEN */);
var MerlinLeft_X = 0 + Merlin.Width; var MerlinTop_Y = 0 + Merlin.Height;
var MerlinCenter_X = _x / 2 - Merlin.Width / 2; var MerlinRight_X = _x - Merlin.Width;
var MerlinCenter_Y = _y / 2 - Merlin.Height / 2; var MerlinBottom_Y = _y - Merlin.Height;
Is ok, I forgot to declare my variables at front of my script.